Winding Ohmmeters
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Tap Changer Analyzers & Winding Ohmmeters
Winding resistance test of inductive test objects, such as power transformers, is one of the most effective non-intrusive ways of checking its condition. Due to their advanced design, DV Power winding resistance meters provide high test currents (up to 100 A DC) and high accuracy (up to 0.1%) within light and portable test instruments. In addition to winding resistance measurement, it is also possible to perform simple, quick and reliable transformer on-load tap changer condition assessment by recording the test current during tap changer operation, also known as DVtest. Because of that, problems with a tap changer connection, contacts, and switching procedure can be detected.DV Power winding ohmmeters consist of single-phase RMO-T and three-phase TWA series. Models from the TWA series are designed for six-winding resistance measurement of power and distribution transformers, with only one single-step cable setup. As a result of reducing the total test time, it enables significant saving of time and money.Typical application areas of these instruments are high-voltage substations and industrial environments. They are intended to measure the resistance of:Transformer windingsOn-load tap changersGeneratorsElectrical motorsHigh-current bus bar jointsCable splicesWelding joints
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Motor Winding Ohmmeter
RMO-M Series
The motor/generator winding resistance test is used to identify open windings, shorts between two windings, short to grounds, connection mistakes or shorted turns. This non-invasive test of winding resistance helps to pinpoint problems regarding windings in stator or rotor part of an electrical machine. Additionally, motor winding ohmmeter has the capability of performing heat run test which will show a change in windings resistance with an increase of temperature.The RMO-M series is designed as an ideal aid in preventive maintenance of electrical motors and generators. They are powerful (up to 100A of test current), portable (8 kg) and generate DC current which is completely ripple-free. This makes measurement very precise with 0,1% accuracy.Three voltage channels make measurement very easy since it is possible to obtain a value of all three winding resistances in one measurement
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Transformer Winding Resistance Meters
RMO TT Series
The Tap Changer Analyzer & Winding Ohmmeter of the RMO-TT series is designed for winding resistance measurement of inductive objects, and for a tap changer analysis. The RMO-TT series is based on the state of the art technology, using the most advanced switch mode technology available today. The RMO-TT instruments are accurate (0,1%), powerful (up to 100 A) and still portable. The Instruments generate a true DC ripple free current with automatically regulated measurement and discharging circuit. RMO-TT instruments can perform a simple, quick and reliable transformer on-load tap changer condition assessment. This series of instruments enable measurements of a winding resistance in every tap position, current ripple values (percentage of a current drop during a tap change) and transition times during the tap changes. Problems with a connection, contacts, and selector/diverter switch operation (tap change with interruption) can be detected with these measurements.
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Ohmmeter
PDRM-10A
The PDRM-10 A ohmmeter, with a range of 0.01µΩ to 200 Ω is currently the most accurate and highest resolution ohmmeter on the market, and at only 860 g it is also the lightest and most compact. All this has made it the standard low resistance ohmmeter in many electrical companies, industries and assembly companies. It has a resolution of 0.01µΩ.
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Micro Ohmmeter
HTHL-200P / 384
Wuhan Huatian Electric Power Automation Co., Ltd.
High-precision measurement for high-voltage switch contact (loop) resistance, also suitable for other occasions requiring high current and micro resistance measurement.
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Micro Ohmmeter
HTHL-200A / 381
Wuhan Huatian Electric Power Automation Co., Ltd.
Special instrument for circuit resistance measurement.
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Digital Micro Ohmmeter
*For fast and accurate measurements of low resistance on Switch Contacts, SF-6 Switch Gear, Bushbars, Splices, Joints, Fuses, Breaker Contacts, and Rail Bonds.*100A DC continuous current in 4 ranges of 10A, 20A, 50A and 100A*4 1/2 digit display for higher resolution*Wide resistance range of 20µΩ to 200mΩ in 5 ranges*Suitable for operation in energized switchyard conditions*SMPS based- lightweight and portable
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Micro - Ohmmeter / Milli - Ohmmeter
Basic Accuracy 0.25%Max. Test Current : 5A (120mV) for 7002Max. Test Current : 10A (60mV) for 7272Manual or Auto RangeFour Terminal Kelvin Measurement6 Ranges with 1mV Best ResolutionMeasurement of Resistive and Inductive MaterialsSetting for HI, LO & PASS ReadingsMemory of 3000 Measurements DataProgrammable HI-LO Alarm with memory of 20 DataLarge LCD with Backlight & HOLD FunctionLow Power ConsumptionBattery Operated with AC AdaptorLow Battery (Voltage) AlarmLED indication for Invalid Resistance MeasurementCable Length Measurement in feet & metersUser Interface Software for PC Communication via RS232C(to USB Bridge) cableBuilt-inBatery Chaging Circuit & Calender Clock
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OHMMETERS
DOT-1000-2
Model DOT-1000-2, is an ac four-terminal ohmmeter to be used for the measurement of dynamic ac resistance of batteries, fuel cells and other voltage sources.
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Impulse Winding Tester
TH2883-10
Changzhou Tonghui Electronic Co., Ltd.
TH2883 series products are newly developed impulse winding testers by Tonghui. This product line makes Tonghui as the first provider of impulse winding tester from low voltage of 30V to high voltage of 10kV, single channel to multichannel (Max.:8 channels) in this industry. The instrument adopts popular 32 bit CPU and high density SMD technology, 65k color 7-inch TFT wide display screen, bringing ease for your eyes and convenience to your operation. The minimum impulse voltage of 30V, maximum impulse voltage output of 10kV, winding test of 1uH inductance value, sampling rate of 200Msps, memory depth of 6k bytes makes your test accurately. The usage of standard sample average, application of demagnetized impulse, high bandwidth analog acquisition circuit, technology of high-fidelity corona extraction as well as the opening of non-destructive test reflect the design philosophy “customer-oriented, share the future technology with you” of Tonghui.
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Wind Sensors
FT742
The FT742 measures wind speeds up to 75 m/s. Its innovative design incorporates a series of “turbulators” which condition the air flow to deliver our highest levels of accuracy yet. Available in four mounting options, the Flat Front (FF) and Pipe Mount (PM) are typically used in wind turbine control and the Direct Mount (DM) in meteorological applications. The Surface Mount (SM) has been specifically designed for OEM integration and for use on UAVs/drones.
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Wind Turbine Lidar
ZephIR 300
ZephIR 300 measures wind characteristics onshore and on fixed or floating platforms offshore from just 10 metres (33 feet) up to 200 metres (656 feet) from installed position to inform wind regime and quality studies during the development and operation of wind farms onshore and offshore.
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Micro Ohmmeter
HTHL-100A / 380
Wuhan Huatian Electric Power Automation Co., Ltd.
Special instrument for circuit resistance measurement.
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MICRO OHM-METER
UONT100A
International Biological Laboratories
This Test Set is capable to measure low resistance like switch contacts, breaker contacts, busbar splices, joints, fuses, low inductive windings etc. by circulating high value of D.C. through the contact/junction and measuring D.C voltage drop (4 terminal method) which, sent to instrument amplifiers , thereby being displayed on resistance meter.
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Impulse Winding Tester
TH2883-1
Changzhou Tonghui Electronic Co., Ltd.
TH2883 series products are newly developed impulse winding testers by Tonghui. This product line makes Tonghui as the first provider of impulse winding tester from low voltage of 30V to high voltage of 10kV, single channel to multichannel (Max.:8 channels) in this industry. The instrument adopts popular 32 bit CPU and high density SMD technology, 65k color 7-inch TFT wide display screen, bringing ease for your eyes and convenience to your operation. The minimum impulse voltage of 30V, maximum impulse voltage output of 10kV, winding test of 1uH inductance value, sampling rate of 200Msps, memory depth of 6k bytes makes your test accurately. The usage of standard sample average, application of demagnetized impulse, high bandwidth analog acquisition circuit, technology of high-fidelity corona extraction as well as the opening of non-destructive test reflect the design philosophy “customer-oriented, share the future technology with you” of Tonghui.
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Wind Turbine Condition Monitoring
It has also become increasingly apparent in recent years that the wind turbine industry has recognised the importance of condition-based monitoring, especially for offshore wind turbines, where access is often limited.To increase reliability and minimise down time, many wind turbine manufacturers, owners and operators are turning to condition-based monitoring systems, aimed at predicting wind turbine maintenance issues, so that operators can quickly and effectively carry out predictive maintenance, repairs and replacements of components when needed, without the need for costly routine maintenance checks and visits. As a result, a condition monitoring system increases operational time, improves site performance and reduces maintenance costs for wind turbines, especially offshore ones.
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Wind Speed Sensor/Anemometer
ENVIROMUX-WSS
Rugged anemometer. 3-cup rotor pressed on a stainless steel shaft. Reed switch and magnet providing one pulse per rotation. Rotor diameter: 5 inches. Speed range: ~ 3 mph to 125+ mph (~5 kph to over 200 kph). Rugged Delrin body with bronze and Rulon bushings. Flat aluminum mounting bracket with 2 holes. esigned to be mounted on top of a pole or bracket. 100 feet of exterior grade wire. Maximum cable length: 1000 ft (305m).
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Semiconductor Package Wind Tunnel
WT-100
Thermal Engineering Associates, Inc.
The WT-100 Forced Convection (Moving Air) Wind Tunnel is designed in accordance with the EIA/JEDEC JESD51-6 standard for thermal characterization of semiconductor packages and devices. The vertical design minimizes laboratory floor space requiements. Air is drawn in at the bottom and exhausts at the top. The test section is large enough to accommodate the largest JEDEC and SEMI thermal test boards. Air velocity can be adjusted over the range of 0.5 to 5 m/s; air velocity is monitored with an included hot-wire anemometer connected to a digital display. A Type-T thermocouple is mounted in the test section for monitoring the moving air temperature.
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Wind River Linux
For more than 15 years Wind River Linux has been the industry’s most advanced embedded Linux platform, with a comprehensive suite of products, tools, and lifecycle services to build and support intelligent edge solutions.
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Winding Resistance Meter
* Selectable four resistance ranges.* 4 1/2 digits LED display* High measurement Current (10A)* True four Technique elimanates lead resistance errors Systems* Fully protected against overloads* Proven design* Computer connectivity through RS 232
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Transformer Winding Resistance Meters
TWA Advanced Series
The TWA advanced series instruments are designed for six-winding resistance measurement and simultaneous three phase on-load tap changer analysis of both the primary and the secondary transformer windings. This is performed with a one singlestep cable setup, with test currents of up to 40A. Each transformer configuration has a special measurement algorithm which is optimized for the fast stabilization of test results. The TWA instruments generate a true DC ripple-free current. Both the injection of the current and the discharge of energy from the magnetic circuit are automatically regulated.
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WINDING COIL TURNS TESTER
VE201R
Winding Turns Tester for Counting Measuring Number of Turns for Air Core Coils, Bobbin Coils or Solenoid Coils. Can Measure : Turns along with Winding Polarity and DC Resistance.Turns Measurement : 1 Turns to 80,000 Turns
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Portable Ohmmeters
Our portable digital ohmmeters offer true portability without any sacrifice to accuracy or functionality. These ruggedly constructed instruments are ideal for use in the workshop, field or test facilities.
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Portable Winding Resistance Tester
1. Handheld winding resistance meter2. Conversion function for standard temperature resistance.3. 500 test data can be saved and download by flash disk.4. Temperature testing function.
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Impulse Winding Tester
TH2883-5
Changzhou Tonghui Electronic Co., Ltd.
TH2883 series products are newly developed impulse winding testers by Tonghui. This product line makes Tonghui as the first provider of impulse winding tester from low voltage of 30V to high voltage of 10kV, single channel to multichannel (Max.:8 channels) in this industry. The instrument adopts popular 32 bit CPU and high density SMD technology, 65k color 7-inch TFT wide display screen, bringing ease for your eyes and convenience to your operation. The minimum impulse voltage of 30V, maximum impulse voltage output of 10kV, winding test of 1uH inductance value, sampling rate of 200Msps, memory depth of 6k bytes makes your test accurately. The usage of standard sample average, application of demagnetized impulse, high bandwidth analog acquisition circuit, technology of high-fidelity corona extraction as well as the opening of non-destructive test reflect the design philosophy “customer-oriented, share the future technology with you” of Tonghui.
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TRANSFORMER WINDING RESISTANCE METER
International Biological Laboratories
This Test set is suitable to measure winding resistance of transformers, single or 3-phase, star or delta connected upto several MVA.Two independent displays read the resistance of both primary & secondary windings simultaneously. However, primary or secondary winding can also be measured separately.
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Wind Turbine Performance Lidar
Wind Iris
The Wind Iris is based on Leosphere's leading WINDCUBE pulsedLidar technology, and is the first remote sensor dedicated to turbine-mounted measurements. It measures the horizontal wind speed and direction from 40m to 400m upwind of the turbine. Real time and average data can then be transferred automatically or stored in a data logger.
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